US20160017117A1 - Suspension of inorganic material in phosphate ester, a flame retarded thermoplastic composition containing the same - Google Patents
Suspension of inorganic material in phosphate ester, a flame retarded thermoplastic composition containing the same Download PDFInfo
- Publication number
- US20160017117A1 US20160017117A1 US14/772,223 US201414772223A US2016017117A1 US 20160017117 A1 US20160017117 A1 US 20160017117A1 US 201414772223 A US201414772223 A US 201414772223A US 2016017117 A1 US2016017117 A1 US 2016017117A1
- Authority
- US
- United States
- Prior art keywords
- thermoplastic resin
- flame retarded
- inorganic
- stable suspension
- phosphate ester
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- -1 phosphate ester Chemical class 0.000 title claims abstract description 58
- 239000000725 suspension Substances 0.000 title claims abstract description 43
- 229910019142 PO4 Inorganic materials 0.000 title claims abstract description 42
- 239000010452 phosphate Substances 0.000 title claims abstract description 38
- 239000000203 mixture Substances 0.000 title claims description 51
- 229920001169 thermoplastic Polymers 0.000 title description 16
- 239000004416 thermosoftening plastic Substances 0.000 title description 16
- 229910010272 inorganic material Inorganic materials 0.000 title 1
- 239000011147 inorganic material Substances 0.000 title 1
- 150000003839 salts Chemical class 0.000 claims abstract description 25
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 229910052806 inorganic carbonate Inorganic materials 0.000 claims abstract description 13
- 229910001853 inorganic hydroxide Inorganic materials 0.000 claims abstract description 13
- 229910052809 inorganic oxide Inorganic materials 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 150000002739 metals Chemical class 0.000 claims abstract description 12
- 239000011342 resin composition Substances 0.000 claims abstract description 12
- 230000000737 periodic effect Effects 0.000 claims abstract description 11
- 239000004417 polycarbonate Substances 0.000 claims description 25
- 229920000515 polycarbonate Polymers 0.000 claims description 23
- 239000002270 dispersing agent Substances 0.000 claims description 22
- 239000006185 dispersion Substances 0.000 claims description 15
- 229920001400 block copolymer Polymers 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 9
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims description 8
- 229910001701 hydrotalcite Inorganic materials 0.000 claims description 8
- 229960001545 hydrotalcite Drugs 0.000 claims description 8
- 125000003118 aryl group Chemical group 0.000 claims description 7
- 125000004432 carbon atom Chemical group C* 0.000 claims description 7
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 6
- 229920000570 polyether Polymers 0.000 claims description 6
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 5
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 5
- 239000000347 magnesium hydroxide Substances 0.000 claims description 5
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 5
- 229920005668 polycarbonate resin Polymers 0.000 claims description 5
- 239000004431 polycarbonate resin Substances 0.000 claims description 5
- 229920001223 polyethylene glycol Polymers 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 4
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims description 4
- 229910021645 metal ion Inorganic materials 0.000 claims description 4
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims description 3
- 125000002877 alkyl aryl group Chemical group 0.000 claims description 3
- 125000000129 anionic group Chemical group 0.000 claims description 3
- 125000000732 arylene group Chemical group 0.000 claims description 3
- 125000002091 cationic group Chemical group 0.000 claims description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 2
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 150000001450 anions Chemical class 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- ONIOAEVPMYCHKX-UHFFFAOYSA-N carbonic acid;zinc Chemical compound [Zn].OC(O)=O ONIOAEVPMYCHKX-UHFFFAOYSA-N 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 claims description 2
- 229910001679 gibbsite Inorganic materials 0.000 claims description 2
- 239000001095 magnesium carbonate Substances 0.000 claims description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 2
- UNYOJUYSNFGNDV-UHFFFAOYSA-M magnesium monohydroxide Chemical compound [Mg]O UNYOJUYSNFGNDV-UHFFFAOYSA-M 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 2
- 239000011667 zinc carbonate Substances 0.000 claims description 2
- 229910000010 zinc carbonate Inorganic materials 0.000 claims description 2
- 239000011787 zinc oxide Substances 0.000 claims description 2
- 235000021317 phosphate Nutrition 0.000 description 37
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 18
- 229920005989 resin Polymers 0.000 description 18
- 239000011347 resin Substances 0.000 description 18
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 11
- 229920000578 graft copolymer Polymers 0.000 description 10
- 230000007062 hydrolysis Effects 0.000 description 10
- 238000006460 hydrolysis reaction Methods 0.000 description 10
- 150000004679 hydroxides Chemical class 0.000 description 10
- OWICEWMBIBPFAH-UHFFFAOYSA-N (3-diphenoxyphosphoryloxyphenyl) diphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=C(OP(=O)(OC=2C=CC=CC=2)OC=2C=CC=CC=2)C=CC=1)(=O)OC1=CC=CC=C1 OWICEWMBIBPFAH-UHFFFAOYSA-N 0.000 description 8
- 239000000654 additive Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 6
- 239000003063 flame retardant Substances 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 239000011777 magnesium Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 6
- 239000004952 Polyamide Substances 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 5
- 229920002647 polyamide Polymers 0.000 description 5
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 4
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 4
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 4
- 239000004809 Teflon Substances 0.000 description 4
- 229920006362 Teflon® Polymers 0.000 description 4
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000008188 pellet Substances 0.000 description 4
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- KXGVEGMKQFWNSR-UHFFFAOYSA-N deoxycholic acid Natural products C1CC2CC(O)CCC2(C)C2C1C1CCC(C(CCC(O)=O)C)C1(C)C(O)C2 KXGVEGMKQFWNSR-UHFFFAOYSA-N 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- GLDOVTGHNKAZLK-UHFFFAOYSA-N octadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005191 phase separation Methods 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- BHQCQFFYRZLCQQ-UHFFFAOYSA-N (3alpha,5alpha,7alpha,12alpha)-3,7,12-trihydroxy-cholan-24-oic acid Natural products OC1CC2CC(O)CCC2(C)C2C1C1CCC(C(CCC(O)=O)C)C1(C)C(O)C2 BHQCQFFYRZLCQQ-UHFFFAOYSA-N 0.000 description 2
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 239000004380 Cholic acid Substances 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 2
- 0 [1*]OP(=O)(O[2*])OCOP(=O)(O[3*])O[4*] Chemical compound [1*]OP(=O)(O[2*])OCOP(=O)(O[3*])O[4*] 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
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- 235000011037 adipic acid Nutrition 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 235000019416 cholic acid Nutrition 0.000 description 2
- 229960002471 cholic acid Drugs 0.000 description 2
- BHQCQFFYRZLCQQ-OELDTZBJSA-N cholic acid Chemical compound C([C@H]1C[C@H]2O)[C@H](O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H]([C@@H](CCC(O)=O)C)[C@@]2(C)[C@@H](O)C1 BHQCQFFYRZLCQQ-OELDTZBJSA-N 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- KXGVEGMKQFWNSR-LLQZFEROSA-N deoxycholic acid Chemical compound C([C@H]1CC2)[C@H](O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H]([C@@H](CCC(O)=O)C)[C@@]2(C)[C@@H](O)C1 KXGVEGMKQFWNSR-LLQZFEROSA-N 0.000 description 2
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- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 2
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- 238000001746 injection moulding Methods 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
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- 150000004712 monophosphates Chemical class 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
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- 238000012360 testing method Methods 0.000 description 2
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- 229940082500 cetostearyl alcohol Drugs 0.000 description 1
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- 239000003086 colorant Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 125000000853 cresyl group Chemical group C1(=CC=C(C=C1)C)* 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 235000019329 dioctyl sodium sulphosuccinate Nutrition 0.000 description 1
- 239000001177 diphosphate Substances 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-J diphosphate(4-) Chemical compound [O-]P([O-])(=O)OP([O-])([O-])=O XPPKVPWEQAFLFU-UHFFFAOYSA-J 0.000 description 1
- 235000011180 diphosphates Nutrition 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- YQEMORVAKMFKLG-UHFFFAOYSA-N glycerine monostearate Natural products CCCCCCCCCCCCCCCCCC(=O)OC(CO)CO YQEMORVAKMFKLG-UHFFFAOYSA-N 0.000 description 1
- SVUQHVRAGMNPLW-UHFFFAOYSA-N glycerol monostearate Natural products CCCCCCCCCCCCCCCCC(=O)OCC(O)CO SVUQHVRAGMNPLW-UHFFFAOYSA-N 0.000 description 1
- 125000005908 glyceryl ester group Chemical group 0.000 description 1
- 229940099347 glycocholic acid Drugs 0.000 description 1
- RFDAIACWWDREDC-FRVQLJSFSA-N glycocholic acid Chemical compound C([C@H]1C[C@H]2O)[C@H](O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H]([C@@H](CCC(=O)NCC(O)=O)C)[C@@]2(C)[C@@H](O)C1 RFDAIACWWDREDC-FRVQLJSFSA-N 0.000 description 1
- WVULKSPCQVQLCU-BUXLTGKBSA-N glycodeoxycholic acid Chemical compound C([C@H]1CC2)[C@H](O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H]([C@@H](CCC(=O)NCC(O)=O)C)[C@@]2(C)[C@@H](O)C1 WVULKSPCQVQLCU-BUXLTGKBSA-N 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 150000003840 hydrochlorides Chemical class 0.000 description 1
- DNZMDASEFMLYBU-RNBXVSKKSA-N hydroxyethyl starch Chemical compound OC[C@H]1O[C@H](O)[C@H](O)[C@@H](O)[C@@H]1O.OCCOC[C@H]1O[C@H](OCCO)[C@H](OCCO)[C@@H](OCCO)[C@@H]1OCCO DNZMDASEFMLYBU-RNBXVSKKSA-N 0.000 description 1
- 229940050526 hydroxyethylstarch Drugs 0.000 description 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
- 229940071676 hydroxypropylcellulose Drugs 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 229910003480 inorganic solid Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- ZETYUTMSJWMKNQ-UHFFFAOYSA-N n,n',n'-trimethylhexane-1,6-diamine Chemical compound CNCCCCCCN(C)C ZETYUTMSJWMKNQ-UHFFFAOYSA-N 0.000 description 1
- GOQYKNQRPGWPLP-UHFFFAOYSA-N n-heptadecyl alcohol Natural products CCCCCCCCCCCCCCCCCO GOQYKNQRPGWPLP-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 150000003856 quaternary ammonium compounds Chemical class 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 229940083575 sodium dodecyl sulfate Drugs 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 229940012831 stearyl alcohol Drugs 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000003107 substituted aryl group Chemical group 0.000 description 1
- WBWWGRHZICKQGZ-GIHLXUJPSA-N taurocholic acid Chemical compound C([C@@H]1C[C@H]2O)[C@@H](O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@@H]([C@@H](CCC(=O)NCCS(O)(=O)=O)C)[C@@]2(C)[C@H](O)C1 WBWWGRHZICKQGZ-GIHLXUJPSA-N 0.000 description 1
- OULAJFUGPPVRBK-UHFFFAOYSA-N tetratriacontyl alcohol Natural products CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCO OULAJFUGPPVRBK-UHFFFAOYSA-N 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/06—Ethers; Acetals; Ketals; Ortho-esters
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/06—Phosphorus compounds without P—C bonds
- C07F9/08—Esters of oxyacids of phosphorus
- C07F9/09—Esters of phosphoric acids
- C07F9/12—Esters of phosphoric acids with hydroxyaryl compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
- C08K5/523—Esters of phosphoric acids, e.g. of H3PO4 with hydroxyaryl compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
- C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K21/00—Fireproofing materials
- C09K21/06—Organic materials
- C09K21/12—Organic materials containing phosphorus
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/267—Magnesium carbonate
Definitions
- This disclosure herein relates to a stable suspension of at least one of an inorganic oxide, an inorganic hydroxide, an inorganic carbonate and mixed salts thereof in a phosphate ester, which provides stabilization effect to the said phosphate ester against hydrolysis. More specifically this invention relates to a stable suspension in a liquid phosphate ester of inorganic oxide or inorganic hydroxide or inorganic carbonate or mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements. This invention also relates to a flame-retarded thermoplastic composition containing a thermoplastic resin and the stabilized suspension, and to electronic component(s) containing the flame-retarded thermoplastic composition.
- Liquid aromatic phosphate esters are widely used as halogen-free, flame retardants for addition to engineering plastics, e.g., polycarbonate or polycarbonate/acrylonitrile-butadiene-styrene blends or polycarbonate/pol(butylene terephthalate) bends or similar.
- a disadvantage associated with using liquid aromatic phosphate esters, such as, resorcinol bis(diphenyl phosphate) is their tendency to hydrolyze.
- the acidic species formed by this hydrolysis can attack the acid susceptible polycarbonate which leads to a decrease of the molecular weight of the polycarbonate and as a result, a decrease of its physical properties.
- a second adverse affect that accompanies the formation of hydrolysis decomposition products of the phosphate esters is migration of the hydrolyzed additive to the surface of molded parts, e.g., molded electronic parts. This migration is commonly referred to as “juicing.”
- the results of juicing by the hydrolysis decomposition products include cracks on the surface of the molded part, e.g., molded electronic part, and damage to the tool used to mold the part.
- inorganic additives can react with phosphorus based acidic species thus neutralizing them and decreasing the overall acidity of the phosphate ester.
- the use of the aforementioned inorganic additives is problematic because they undesirably sediment to the bottom of the containers or tanks where the liquid phosphate esters are stored.
- inorganic additives can be added to a flame retarded resin composition during compounding as acid scavenges. This application is limited in its approach due to the poor distribution of the inorganic additives in the resin, and as result, limited contact of the acid scavenging additive with the phosphate ester.
- the inventors herein have unexpectedly discovered a stable suspension of at least one of an inorganic oxide, an inorganic hydroxide, an inorganic carbonate and mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements in a liquid phosphate ester.
- the stable suspension stabilizes the phosphate ester against hydrolysis and thus, reduces the acidic byproducts of the phosphate ester.
- a flame retarded thermoplastic composition that comprises one or more thermoplastic resins that are susceptible to hydrolysis, specifically, polycarbonate and its blends, and acrylonitrile-butadiene-styrene (ABS) copolymer, in combination with the stable suspension described herein.
- ABS acrylonitrile-butadiene-styrene
- stable suspension will comprise a suspension exhibiting little or no change in physical appearance, such as visible sedimentation or gelling for a period of at least 14 days of continuous, undisturbed storage at a temperature of from 20 to about 60° C.
- a stable suspension of an inorganic oxide, an inorganic hydroxide, an inorganic carbonate and mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements in a liquid aromatic phosphate ester which provides for stabilization of the phosphate ester against hydrolysis and provides acid scavenging properties thereto.
- thermoplastic composition comprising at least one hydrolysis-susceptible thermoplastic resin, and at least one acidity-reducing amount of at least one of an inorganic oxide, an inorganic hydroxide, an inorganic carbonate and mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements suspended in a flame retardant effective amount of a liquid phosphate ester.
- this invention relates to a flame retarded polycarbonate or polycarbonate blend containing a stable suspension of at least one of an inorganic oxide, and inorganic hydroxide, and inorganic carbonate or mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements in a liquid phosphate ester.
- liquid phosphate ester employed herein is, in one embodiment, represented by the following formula (I):
- R 1 , R 2 , R 3 and R 4 are each independently selected from the group consisting of an aryl or an alkaryl group containing from 6 to about 12 carbon atoms
- X is an arylene or bisphenylene group containing from 6 to about 18 carbon atoms.
- the phosphate may be a low molecular weight phosphate such as a monophosphate wherein n is 0 and as such will typically have a molecular weight less than about 500.
- the phosphate may also contain an oligomeric phosphate wherein n has an average value of from 0 to 5 in which case the weight average molecular weight the phosphate is at least about 500 and more specifically about 500 to about 2000 measured at 25 degrees Celsius.
- the phosphate can be a mixture of any of the phosphates described herein. Mixtures of monophosphates with higher molecular weights phosphates are especially useful for balancing physical properties such as melt viscosity and heat deflection temperature of the thermoplastic compositions described herein.
- the aryl groups may be aryl or an alkyl substituted aryl group (i.e. alkaryl group) containing from about 6 to about 12 carbon atoms. More specifically, the aryl groups are independently selected from phenyl, cresyl, xylyl, propylphenyl and butylphenyl groups.
- the arylene or bisphenylene group is derived from a dihydric compound and is more specifically resorcinol, hydroquinone or bisphenol-A.
- the aryl groups (R 1 , R 2 , R 3 and R 4 ) are more specifically phenyl.
- the phosphate ester will be present in the stable suspension in an amount of from about 80 to about 99.9 weight percent, more specifically from about 85 to about 99.9 weight percent and most specifically from about 90.00 to about 99.98 weight percent based on the weight of the stable suspension.
- the at least one of an inorganic oxide, and inorganic hydroxide, and inorganic carbonate or mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements can include the simple oxides, hydroxides and carbonates of the metals of the groups II and III, as well as mixed compounds such as the hydroxycarbonates of one or more of the metals of groups II and III of the Periodic Table.
- the at least one of an inorganic oxide, and inorganic hydroxide, and inorganic carbonate or mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements are selected from the group consisting of Mg(OH) 2 , MgO, Al 2 O 3 , Al(OH) 3 , MgCO 3 , (MgOH) 2 CO 3 , CaCO 3 , ZnO, ZnCO 3 and mixtures thereof.
- the mixed salt of the stable suspension herein may be at least one hydrotalcite which reduces the acidity of the phosphate ester(s).
- Some examples are synthetic or natural hydrotalcites of the general formula (II):
- M 2+ is a divalent metal ion, more specifically, Mg 2+
- M 3+ is a trivalent metal ion, more specifically, Al 3+
- a n is an n-valent anion, more specifically, CO 3 2 ⁇ or SO 4 2 ⁇
- n is an integer greater than 0, more specifically 2
- x is 0 to 0.5, more specifically 0 to 0.33, and m>0, more specifically >0.5.
- Suitable hydrotalcites include hydrous or anhydrous basic carbonates of magnesium, calcium, zinc, aluminum, bismuth. These hydrotalcites can be natural or synthetic. Examples of natural hydrotalcites include one represented by the general formula Mg 6 Al 2 (OH) 16 CO 3 4H 2 O.
- Examples of synthetic hydrotalcites include Mg 0.7 Al 0.3 (OH) 2 (CO 3 ) 0.15 0.5H 2 O, Mg 4.5 Al 2 (OH) 13 CO 3 3.5H 2 O, Mg 4.2 Al 2 (OH) 12.4 CO 3 4H 2 O, Mg 4.3 Al 2 (OH) 12.6 CO 3 4H 2 O, Zn 6 Al 2 (OH) 16 CO 3 4H 2 O, Ca 6 Al 2 (OH) 16 CO 3 4H 2 O, and Mg 14 Bi 2 (OH) 29.6 4.2H 2 O.
- the inorganic agents which are particularly suitable for the suspension are Mg(OH) 2 and the hydrotalcites described herein.
- the oxides, hydroxides, carbonates or mixed metal salts will have particle median particle size of D 50 of less than 3 microns and more specifically, less than 2 microns and 99% of all particles will have a diameter D 99 of less than 8 microns and more specifically, less than 5 microns.
- the stable suspension can contain in on embodiment from about 0.01 wt. % to about 5 wt. % of the oxides, hydroxides, carbonates or mixed salts and more specifically from about 0.2 to about 1.5 wt. % of the oxides, hydroxides, carbonates or mixed salts, based on the total weight of the stable suspension.
- Dispersants are used herein in order to lower the dispersing forces needed and in order to minimize the total input into the system of energy needed to deflocculate the particulate solids during formulation preparation.
- the dispersants used herein are surface-active substances of anionic, cationic or neutral structure. These substances, in a small amount, are either applied directly to the inorganic solid or added to the dispersing medium (i.e., the phosphate ester).
- Suitable anionic dispersants include but are not limited to: potassium laurate, sodium lauryl sulfate, sodium dodecylsulfate, alkyl polyoxyethylene sulfates, sodium alginate, dioctyl sodium sulfosuccinate, phosphatidyl glycerol, phosphatidic acid and their salts, glyceryl esters, sodium carboxymethylcellulose, cholic acid and other bile acids (e.g., cholic acid, deoxycholic acid, glycocholic acid, taurocholic acid, glycodeoxycholic acid) and salts thereof (e.g., sodium deoxycholate, etc.).
- potassium laurate sodium lauryl sulfate, sodium dodecylsulfate, alkyl polyoxyethylene sulfates, sodium alginate, dioctyl sodium sulfosuccinate, phosphatidyl glycerol, phosphatidic acid and their salts,
- Suitable cationic dispersants include but are not limited to quaternary ammonium compounds, such as benzalkonium chloride, cetyltrimethylammonium bromide, lauryldimethylbenzylammonium chloride, acyl camitine hydrochlorides, or alkyl pyridinium halides.
- Suitable nonionic dispersants include: polyoxyethylene fatty alcohol ethers, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene fatty acid esters, sorbitan esters, glycerol monostearate, polyethylene glycols, polypropylene glycols, cetyl alcohol, cetostearyl alcohol, stearyl alcohol, aryl alkyl polyether alcohols, polyoxyethylene-polyoxypropylene copolymers, polaxamines, methylcellulose, hydroxycellulose, hydroxy propylcellulose, hydroxy propylmethylcellulose, noncrystalline cellulose, polysaccharides including starch and starch derivatives such as hydroxyethylstarch, polyvinyl alcohol, and polyvinylpyrrolidone.
- the nonionic surfactant is a polyoxyethylene and polyoxypropylene copolymer and preferably a block copolymer of propylene glycol and ethylene glycol.
- polyoxyethylene fatty acid esters are included those having short alkyl chains of less than 6 carbon atoms, specifically less than 4 carbon atoms.
- the most specific dispersants herein include a nonionic modified polyether dispersant available from Evonik under the trade name Tegomer DA 646 and nonionic block copolymer of polyhydroxystearic acid and polyethylene glycol available from Huntsman under the trade name Tersperse 2510 or mixtures thereof.
- the stable suspension of the present invention contains from about 0.01 to about 5 wt. % of the dispersant and more specifically from about 0.1 to about 2 wt. % the dispersant.
- the dispersion of the oxides, hydroxides, carbonates or mixed salts in liquid phosphate ester can be prepared by using different high shear mixers or ultrasound techniques.
- the list of most common, but not limited to techniques is dissolver stirrers, high-shear rotor/stator (HSM) mixer, ultrahigh-shear inline mixer (UHSM)
- the dispersing agent before the addition of the oxides, hydroxides, carbonates or mixed salts to the liquid phosphate ester, the dispersing agent is added and mixed with the liquid phosphate ester using a conventional mechanical or magnetic stirrer.
- the oxides, hydroxides, carbonates or mixed salts can be added to the liquid phosphate ester and mixed, followed by addition and mixing of the dispersing agent thereto.
- the dispersing agent can be added to the oxides, hydroxides, carbonates or mixed salts and mixed, followed by addition and mixing of the liquid phosphate ester.
- the dispersant or mixture thereof can be added to the phosphate ester with application of mixing for about 30 minutes, e.g., using a four bladed propeller Teflon stirrer at about 630 rpm (rotations per minute), the stirrer can then be replaced with a rotor-stator ultra-disperser, and after less than a minute the inorganic particles can be added and the dispersion process continued at about 10,600 rpm for about 10 minutes and then at an increased speed of about 12,600 rpm for an additional 10 minutes.
- thermoplastic resin composition comprising the hydrolysis stabilized phosphate ester stable suspension of the oxides, hydroxides, carbonates or mixed salts described herein and thermoplastic resin, e.g., a hydrolysis susceptible thermoplastic resin. More specifically this invention relates to a flame retarded thermoplastic composition comprising a polycarbonate or polycarbonate blend and the stable suspension of inorganic oxide, inorganic hydroxide, inorganic carbonate or mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements described herein.
- the flame retarded thermoplastic composition herein can comprise thermoplastic resins such as those thermoplastic resins having susceptibility to degradation by hydrolysis and to blends, or alloys, containing one or more of such resins.
- the flame-retarded thermoplastic composition will contain an effective flame-retardant amounts of the stable suspension described herein and hydrolysis-susceptible resins such as polyesters, e.g., alkylene polyesters of terephthalic acid such as polyethylene terephthalate, polybutylene terephthalate, poly-1,4-cyclohexane-dimethylene terephthalate, or polyamides, e.g.
- Aromatic polycarbonate resins are known compounds and the properties and methods of making polycarbonate resins are also known. Typically these are prepared by reacting a dihydric phenol with a carbonate precursor, such as phosgene, a haloformate or a carbonate ester and generally in the presence of an acid acceptor and a molecular weight regulator.
- a carbonate precursor such as phosgene, a haloformate or a carbonate ester
- the more specific polycarbonate resin used herein for the flame retarded thermoplastic composition is bisphenol A polycarbonate.
- the graft copolymer resin is preferably a graft copolymer resin comprising a rubbery polymeric substrate and a rigid syrene superstrate.
- the graft copolymer comprises more than 30% by weight rubbery polymeric substrate to styrene superstrate.
- the graft copolymer resin may also be used in combination with various block copolymer resins, such as, for example, polystyrene-polybutadiene diblock, triblock, or larger multi-block copolymer resins, polystyrene-poly(ethylenebutylene) diblock, triblock, or larger multi-block copolymer resins, and polystyrene-poly(ethylene-propylene) diblock, triblock, or larger multi-block copolymer resins, as well as mixtures of block copolymer resins.
- block copolymer resins such as, for example, polystyrene-polybutadiene diblock, triblock, or larger multi-block copolymer resins, polystyrene-poly(ethylenebutylene) diblock, triblock, or larger multi-block copolymer resins, as well as mixtures of block copolymer resins.
- the styrene graft copolymer can be any one or more of an ABS resin (acrylonitrile/butadiene/styrene copolymer), an AES resin (acrylonitrile/ethylene/propylene/styrene copolymer), an ACS resin (acrylonitrile/chlorinated polyethylene/styrene copolymer), or an AAS resin (acrylonitrile/acrylic elastomer/styrene copolymer).
- ABS resin acrylonitrile/butadiene/styrene copolymer
- AES resin acrylonitrile/ethylene/propylene/styrene copolymer
- an ACS resin acrylonitrile/chlorinated polyethylene/styrene copolymer
- AAS resin acrylonitrile/acrylic elastomer/styrene copolymer
- the ratio between polycarbonate and the styrene graft copolymer can be from about 50:50 to about 95:5. In more specific embodiment the ratio is from 70:30 to 90:10.
- the flame retarded thermoplastic resin composition can contain the thermoplastic resin in an amount of from about 60 to about 99 weight percent, more specifically from about 75 to about 97 weight percent and most specifically from about 85 to about 96 weight percent, said weight percents being based on the total weight of the flame retarded thermoplastic composition.
- the flame retarded thermoplastic resin composition can contain the stable suspension in an amount of from about 1 to about 40 weight percent, more specifically from about 3 to about 25 weight percent and most specifically from about 4 to about 15 weight percent, said weight percents being based on the total weight of the flame retarded thermoplastic composition.
- the stable suspension of oxides, hydroxides, carbonates or mixed salts in a phosphate ester can be added to a polycarbonate/styrene graft copolymer blend during extrusion.
- Known techniques of metering pumping of viscous liquids into one of heating zones of extruder are used.
- the amount of the stable suspension component to be added to the thermoplastic resin will depend on the ratio of polycarbonate/styrene graft copolymer. The higher concentration of the polycarbonate the lower loading of stable suspension is required to achieve flame retardant effect and pass for example the UL-94 V-0 test.
- the amount of phosphate ester thereof can vary from about 1 to about 40, more specifically from about 3 to about 25, and more specifically from about 4 to about 15 weight percent of the total weight of the flame retarded thermoplastic composition.
- the flame retarded composition herein optionally contains a tetrafluoroethylene polymer, also referred to as PTFE, as antidripping agent.
- a tetrafluoroethylene polymer also referred to as PTFE
- Suitable tetrafluoroethylene polymers for use in this invention typically have a fibril structure which tends to stabilize the polymer under molten conditions.
- the PTFE can be added to the thermoplastic resin composition as a direct solid or as a concentrate with a resin such as polycarbonate or SAN. Typically PTFE is added at the level from about 0.01 to about 2.0 but more specifically from about 0.1 to about 0.5 weight percent of the total weight of flame retarded thermoplastic composition.
- the flame retarded thermoplastic composition herein can contain one or more other additives in known and conventional amounts, e.g., antioxidants, UV stabilizers, plasticizers, fillers, reinforcements, pigments, colorants, other flame retardants, and the like, as is well known to those skilled in the art.
- additives e.g., antioxidants, UV stabilizers, plasticizers, fillers, reinforcements, pigments, colorants, other flame retardants, and the like, as is well known to those skilled in the art.
- HTC hydrotalcite
- d 50 1.2 micron
- resorcinol bis(diphenyl phosphate) (Fyrolflex RDP, ex. ICL-IP) was added to a PE beaker.
- resorcinol bis(diphenyl phosphate) (Fyrolflex RDP, ex. ICL-IP) was added to a PE beaker.
- 0.9 g of modified polyether dispersant (Tegomer DA 646, Evonik) and 0.9 of nonionic block copolymer of polyhydroxystearic acid and polyethylene glycol dispersant (Tersperse 2510, Huntsman) were added to the beaker and a four bladed propeller Teflon stirrer was set up at 630 rpm for 30 minutes.
- the dispersion was transferred to a glass jar. No sedimentation of the material at the bottom of Vessel glass jar was noticed. Long term stability of the dispersion was assessed by an accelerated aging method by heating the suspension in an oven at 54° C. for 14 days. No separation or precipitation was observed. The sample was also kept at ⁇ 20° C. for two weeks and no difference in the flowability compared to an equivalent sample kept at room temperature was detected. In addition no phase separation was detected at these temperatures.
- Examples 1-3 were repeated with variation of concentration of inorganic ingredient and dispersants.
- the composition of the various stable suspensions of Examples 1-7 are shown in Table 1.
- Comparative Example 1 and Examples 8-14 were prepared in the same manner.
- the polycarbonate resin (Lexan 141, ex. Sabic) and ABS resin (C8707 ex. Sabic) was pre-dried prior to the extrusion.
- the two resins and a RDP (Comparative example 1) or stable suspension (Examples 8-14) were thoroughly mixed in the proportions shown in Table 2 using a bowl mixer.
- the pre-mixed flame retarded compositions were slowly forced-fed into the extruder hopper.
- Test specimens were prepared by injection molding the pellets of compounded mixtures on Arburg All-Rounder Injection Molding machine at 210-265° C.
- the hydrolytic stability of the flame retarded compositions of Comparative example 1 and Examples 8-14 were evaluated by measuring the retained molecular weight of polycarbonate after various periods of exposure to high humidity at elevated temperature. About 3 ml of de-ionized water was placed into sealable vials. A wad of glass fibers was placed above the water to separate pellets from the direct contact with water. Identical amounts of the flame retarded composition in the form of pellets of substantially uniform dimensions were placed on the top of the glass fiber wad. The vials were sealed and then heated to 107° C. for 0, 30, 90 and 192 hours.
- pellets were removed from the vials and extracted with acetone to isolate the polycarbonate which was then analyzed by GPC (gel permeation chromatography using chloroform) for determining the molecular weight.
- Flammability of the molded specimens of the flame retarded compositions was tested on 1.6 mm thickness bars following the UL-94 vertical burning protocol using an Atlas Chamber. Tensile and flexural strength was measured on Instron instrument following ISO 527 and ISO 178 respectively. Izod Impact strength was measured using a Pendulum Impact Tester following ISO 180.
- compositions Compositions, hydrolytic stability, flammability and physical properties of flame retardant compositions.
- Composition wt. % Comp. ex. 1 Ex. 8 Ex. 9 Ex. 10 Ex. 11 Ex. 12 Ex. 13 Ex. 14 PC 72.9 72.9 72.9 72.9 72.9 72.9 ABS 18.2 18.2 18.2 18.2 18.2 18.2 18.2 18.2 18.2 RDP 9.0 Suspension Ex. 1 9.0 Ex. 2 9.0 Ex. 3 9.0 Ex. 4 9.0 Ex. 5 9.0 Ex. 6 9.0 Ex.
- Table 2 shows the flame retarded composition based on regular grade of RDP retains only 21% of the original weight of polycarbonate after exposure to high temperature and moisture for 192 hours. In contrast the flame retarded composition with stable suspensions of MDH or HTC or mixtures thereof retained from 50 to 73% of the original molecular weight of polycarbonate.
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Abstract
There is provided herein a stable suspension of at least one of an inorganic oxide, an inorganic hydroxide, an inorganic carbonate and mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements in a liquid phosphate ester. There is also provided a flame retarded thermoplastic resin composition containing a hydrolysis-susceptible thermoplastic resin and the stable suspension. There is also provided an electronic component comprising the flame retarded thermoplastic resin composition.
Description
- This application claims priority from U.S. Provisional application No. 61/804,274 Filed on Mar. 22, 2013.
- This disclosure herein relates to a stable suspension of at least one of an inorganic oxide, an inorganic hydroxide, an inorganic carbonate and mixed salts thereof in a phosphate ester, which provides stabilization effect to the said phosphate ester against hydrolysis. More specifically this invention relates to a stable suspension in a liquid phosphate ester of inorganic oxide or inorganic hydroxide or inorganic carbonate or mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements. This invention also relates to a flame-retarded thermoplastic composition containing a thermoplastic resin and the stabilized suspension, and to electronic component(s) containing the flame-retarded thermoplastic composition.
- Liquid aromatic phosphate esters are widely used as halogen-free, flame retardants for addition to engineering plastics, e.g., polycarbonate or polycarbonate/acrylonitrile-butadiene-styrene blends or polycarbonate/pol(butylene terephthalate) bends or similar. A disadvantage associated with using liquid aromatic phosphate esters, such as, resorcinol bis(diphenyl phosphate) is their tendency to hydrolyze.
- The acidic species formed by this hydrolysis can attack the acid susceptible polycarbonate which leads to a decrease of the molecular weight of the polycarbonate and as a result, a decrease of its physical properties. A second adverse affect that accompanies the formation of hydrolysis decomposition products of the phosphate esters is migration of the hydrolyzed additive to the surface of molded parts, e.g., molded electronic parts. This migration is commonly referred to as “juicing.” The results of juicing by the hydrolysis decomposition products include cracks on the surface of the molded part, e.g., molded electronic part, and damage to the tool used to mold the part.
- It is known that some inorganic additives can react with phosphorus based acidic species thus neutralizing them and decreasing the overall acidity of the phosphate ester. However the use of the aforementioned inorganic additives is problematic because they undesirably sediment to the bottom of the containers or tanks where the liquid phosphate esters are stored. It is also known that inorganic additives can be added to a flame retarded resin composition during compounding as acid scavenges. This application is limited in its approach due to the poor distribution of the inorganic additives in the resin, and as result, limited contact of the acid scavenging additive with the phosphate ester.
- In the view of these problems it would be desirable to provide a stable dispersion of inorganic additives in a liquid phosphate ester which can be stored or transported or pumped into an extruder without separation.
- The inventors herein have unexpectedly discovered a stable suspension of at least one of an inorganic oxide, an inorganic hydroxide, an inorganic carbonate and mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements in a liquid phosphate ester. The stable suspension stabilizes the phosphate ester against hydrolysis and thus, reduces the acidic byproducts of the phosphate ester. There is also provided a flame retarded thermoplastic composition that comprises one or more thermoplastic resins that are susceptible to hydrolysis, specifically, polycarbonate and its blends, and acrylonitrile-butadiene-styrene (ABS) copolymer, in combination with the stable suspension described herein. There are also provided electronic components comprising the flame retarded thermoplastic composition.
- In one embodiment herein it will be understood that the expression “stable suspension” will comprise a suspension exhibiting little or no change in physical appearance, such as visible sedimentation or gelling for a period of at least 14 days of continuous, undisturbed storage at a temperature of from 20 to about 60° C.
- In one embodiment herein there is provided a stable suspension of an inorganic oxide, an inorganic hydroxide, an inorganic carbonate and mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements in a liquid aromatic phosphate ester, which provides for stabilization of the phosphate ester against hydrolysis and provides acid scavenging properties thereto. Further in keeping with the invention, there is provided a flame retarded thermoplastic composition comprising at least one hydrolysis-susceptible thermoplastic resin, and at least one acidity-reducing amount of at least one of an inorganic oxide, an inorganic hydroxide, an inorganic carbonate and mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements suspended in a flame retardant effective amount of a liquid phosphate ester.
- More specifically this invention relates to a flame retarded polycarbonate or polycarbonate blend containing a stable suspension of at least one of an inorganic oxide, and inorganic hydroxide, and inorganic carbonate or mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements in a liquid phosphate ester.
- The liquid phosphate ester employed herein is, in one embodiment, represented by the following formula (I):
- wherein R1, R2, R3 and R4 are each independently selected from the group consisting of an aryl or an alkaryl group containing from 6 to about 12 carbon atoms, X is an arylene or bisphenylene group containing from 6 to about 18 carbon atoms. The phosphate may be a low molecular weight phosphate such as a monophosphate wherein n is 0 and as such will typically have a molecular weight less than about 500. The phosphate may also contain an oligomeric phosphate wherein n has an average value of from 0 to 5 in which case the weight average molecular weight the phosphate is at least about 500 and more specifically about 500 to about 2000 measured at 25 degrees Celsius. Alternatively, the phosphate can be a mixture of any of the phosphates described herein. Mixtures of monophosphates with higher molecular weights phosphates are especially useful for balancing physical properties such as melt viscosity and heat deflection temperature of the thermoplastic compositions described herein.
- In the above formula (I) for the phosphates of the invention, the aryl groups may be aryl or an alkyl substituted aryl group (i.e. alkaryl group) containing from about 6 to about 12 carbon atoms. More specifically, the aryl groups are independently selected from phenyl, cresyl, xylyl, propylphenyl and butylphenyl groups. The arylene or bisphenylene group is derived from a dihydric compound and is more specifically resorcinol, hydroquinone or bisphenol-A. The aryl groups (R1, R2, R3 and R4) are more specifically phenyl. In the case of the oligomeric phosphates, the more specific liquid phosphate ester is resorcinol bis(diphenyl phosphate) wherein n is from 1 to about 5, with diphosphate with n=1 being the main component of the mixture, X is resorcinol and each of the R groups is phenyl.
- The phosphate ester will be present in the stable suspension in an amount of from about 80 to about 99.9 weight percent, more specifically from about 85 to about 99.9 weight percent and most specifically from about 90.00 to about 99.98 weight percent based on the weight of the stable suspension.
- In one non-limiting embodiment, the at least one of an inorganic oxide, and inorganic hydroxide, and inorganic carbonate or mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements can include the simple oxides, hydroxides and carbonates of the metals of the groups II and III, as well as mixed compounds such as the hydroxycarbonates of one or more of the metals of groups II and III of the Periodic Table.
- In one non-limiting embodiment some examples the at least one of an inorganic oxide, and inorganic hydroxide, and inorganic carbonate or mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements are selected from the group consisting of Mg(OH)2, MgO, Al2O3, Al(OH)3, MgCO3, (MgOH)2CO3, CaCO3, ZnO, ZnCO3 and mixtures thereof.
- The mixed salt of the stable suspension herein may be at least one hydrotalcite which reduces the acidity of the phosphate ester(s). Some examples are synthetic or natural hydrotalcites of the general formula (II):
-
M2+ (1-x)M3+ x(OH)2An x/2 mH2O (II) - wherein M2+ is a divalent metal ion, more specifically, Mg2+, M3+ is a trivalent metal ion, more specifically, Al3+, An is an n-valent anion, more specifically, CO3 2− or SO4 2−, n is an integer greater than 0, more specifically 2, x is 0 to 0.5, more specifically 0 to 0.33, and m>0, more specifically >0.5.
- Suitable hydrotalcites include hydrous or anhydrous basic carbonates of magnesium, calcium, zinc, aluminum, bismuth. These hydrotalcites can be natural or synthetic. Examples of natural hydrotalcites include one represented by the general formula Mg6Al2(OH)16CO3 4H2O. Examples of synthetic hydrotalcites include Mg0.7Al0.3(OH)2(CO3)0.15 0.5H2O, Mg4.5Al2(OH)13CO3 3.5H2O, Mg4.2Al2(OH)12.4CO3 4H2O, Mg4.3Al2(OH)12.6CO3 4H2O, Zn6Al2(OH)16CO3 4H2O, Ca6Al2(OH)16CO3 4H2O, and Mg14Bi2(OH)29.6 4.2H2O.
- The inorganic agents which are particularly suitable for the suspension are Mg(OH)2 and the hydrotalcites described herein.
- For a more proper dispersion and formation of an even more stable suspension, the oxides, hydroxides, carbonates or mixed metal salts will have particle median particle size of D50 of less than 3 microns and more specifically, less than 2 microns and 99% of all particles will have a diameter D99 of less than 8 microns and more specifically, less than 5 microns.
- The stable suspension can contain in on embodiment from about 0.01 wt. % to about 5 wt. % of the oxides, hydroxides, carbonates or mixed salts and more specifically from about 0.2 to about 1.5 wt. % of the oxides, hydroxides, carbonates or mixed salts, based on the total weight of the stable suspension.
- In order to be able to incorporate solids into liquid media, high mechanical forces are necessary. Dispersants are used herein in order to lower the dispersing forces needed and in order to minimize the total input into the system of energy needed to deflocculate the particulate solids during formulation preparation. The dispersants used herein are surface-active substances of anionic, cationic or neutral structure. These substances, in a small amount, are either applied directly to the inorganic solid or added to the dispersing medium (i.e., the phosphate ester).
- Suitable anionic dispersants include but are not limited to: potassium laurate, sodium lauryl sulfate, sodium dodecylsulfate, alkyl polyoxyethylene sulfates, sodium alginate, dioctyl sodium sulfosuccinate, phosphatidyl glycerol, phosphatidic acid and their salts, glyceryl esters, sodium carboxymethylcellulose, cholic acid and other bile acids (e.g., cholic acid, deoxycholic acid, glycocholic acid, taurocholic acid, glycodeoxycholic acid) and salts thereof (e.g., sodium deoxycholate, etc.).
- Suitable cationic dispersants include but are not limited to quaternary ammonium compounds, such as benzalkonium chloride, cetyltrimethylammonium bromide, lauryldimethylbenzylammonium chloride, acyl camitine hydrochlorides, or alkyl pyridinium halides.
- Suitable nonionic dispersants include: polyoxyethylene fatty alcohol ethers, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene fatty acid esters, sorbitan esters, glycerol monostearate, polyethylene glycols, polypropylene glycols, cetyl alcohol, cetostearyl alcohol, stearyl alcohol, aryl alkyl polyether alcohols, polyoxyethylene-polyoxypropylene copolymers, polaxamines, methylcellulose, hydroxycellulose, hydroxy propylcellulose, hydroxy propylmethylcellulose, noncrystalline cellulose, polysaccharides including starch and starch derivatives such as hydroxyethylstarch, polyvinyl alcohol, and polyvinylpyrrolidone. In a more specific embodiment the nonionic surfactant is a polyoxyethylene and polyoxypropylene copolymer and preferably a block copolymer of propylene glycol and ethylene glycol. Among polyoxyethylene fatty acid esters are included those having short alkyl chains of less than 6 carbon atoms, specifically less than 4 carbon atoms.
- The most specific dispersants herein include a nonionic modified polyether dispersant available from Evonik under the trade name Tegomer DA 646 and nonionic block copolymer of polyhydroxystearic acid and polyethylene glycol available from Huntsman under the trade name Tersperse 2510 or mixtures thereof.
- The stable suspension of the present invention contains from about 0.01 to about 5 wt. % of the dispersant and more specifically from about 0.1 to about 2 wt. % the dispersant.
- The dispersion of the oxides, hydroxides, carbonates or mixed salts in liquid phosphate ester can be prepared by using different high shear mixers or ultrasound techniques. The list of most common, but not limited to techniques is dissolver stirrers, high-shear rotor/stator (HSM) mixer, ultrahigh-shear inline mixer (UHSM)
- In one non-limiting embodiment, before the addition of the oxides, hydroxides, carbonates or mixed salts to the liquid phosphate ester, the dispersing agent is added and mixed with the liquid phosphate ester using a conventional mechanical or magnetic stirrer. In an alternative embodiment, the oxides, hydroxides, carbonates or mixed salts can be added to the liquid phosphate ester and mixed, followed by addition and mixing of the dispersing agent thereto. In yet another embodiment, the dispersing agent can be added to the oxides, hydroxides, carbonates or mixed salts and mixed, followed by addition and mixing of the liquid phosphate ester.
- In one specific embodiment herein the dispersant or mixture thereof can be added to the phosphate ester with application of mixing for about 30 minutes, e.g., using a four bladed propeller Teflon stirrer at about 630 rpm (rotations per minute), the stirrer can then be replaced with a rotor-stator ultra-disperser, and after less than a minute the inorganic particles can be added and the dispersion process continued at about 10,600 rpm for about 10 minutes and then at an increased speed of about 12,600 rpm for an additional 10 minutes.
- In another embodiment herein there is provided a flame retarded thermoplastic resin composition comprising the hydrolysis stabilized phosphate ester stable suspension of the oxides, hydroxides, carbonates or mixed salts described herein and thermoplastic resin, e.g., a hydrolysis susceptible thermoplastic resin. More specifically this invention relates to a flame retarded thermoplastic composition comprising a polycarbonate or polycarbonate blend and the stable suspension of inorganic oxide, inorganic hydroxide, inorganic carbonate or mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements described herein.
- The flame retarded thermoplastic composition herein can comprise thermoplastic resins such as those thermoplastic resins having susceptibility to degradation by hydrolysis and to blends, or alloys, containing one or more of such resins. In particular, the flame-retarded thermoplastic composition will contain an effective flame-retardant amounts of the stable suspension described herein and hydrolysis-susceptible resins such as polyesters, e.g., alkylene polyesters of terephthalic acid such as polyethylene terephthalate, polybutylene terephthalate, poly-1,4-cyclohexane-dimethylene terephthalate, or polyamides, e.g. polyamide-6, polyamide-6,6, polyamide-11, polyamide-12, polyamide-4,6, polyamide-6,10 and polyamide-6,12, as well as polyamides prepared from terephthalic acid and/or isophthalic acid and trimethylhexamethylenediamine; polyamides prepared from adipic acid and m-xylylenediamines; polyamides prepared from adipic acid, azelaic acid, and 2,2-bis-(p-aminocyclohexyl) propane, and polyamides prepared from terephthalic acid and 4,4′-diaminodicyclohexylmethane and the like, and especially the polycarbonates and blends thereof with styrene graft copolymer resin.
- Aromatic polycarbonate resins are known compounds and the properties and methods of making polycarbonate resins are also known. Typically these are prepared by reacting a dihydric phenol with a carbonate precursor, such as phosgene, a haloformate or a carbonate ester and generally in the presence of an acid acceptor and a molecular weight regulator. The more specific polycarbonate resin used herein for the flame retarded thermoplastic composition is bisphenol A polycarbonate.
- Another thermoplastic resin that may be employed is styrene graft copolymer resin. The graft copolymer resin is preferably a graft copolymer resin comprising a rubbery polymeric substrate and a rigid syrene superstrate. In a more specific embodiment, the graft copolymer comprises more than 30% by weight rubbery polymeric substrate to styrene superstrate. The graft copolymer resin may also be used in combination with various block copolymer resins, such as, for example, polystyrene-polybutadiene diblock, triblock, or larger multi-block copolymer resins, polystyrene-poly(ethylenebutylene) diblock, triblock, or larger multi-block copolymer resins, and polystyrene-poly(ethylene-propylene) diblock, triblock, or larger multi-block copolymer resins, as well as mixtures of block copolymer resins.
- In one specific embodiment herein the styrene graft copolymer can be any one or more of an ABS resin (acrylonitrile/butadiene/styrene copolymer), an AES resin (acrylonitrile/ethylene/propylene/styrene copolymer), an ACS resin (acrylonitrile/chlorinated polyethylene/styrene copolymer), or an AAS resin (acrylonitrile/acrylic elastomer/styrene copolymer).
- In one specific embodiment the ratio between polycarbonate and the styrene graft copolymer can be from about 50:50 to about 95:5. In more specific embodiment the ratio is from 70:30 to 90:10.
- In one embodiment, the flame retarded thermoplastic resin composition can contain the thermoplastic resin in an amount of from about 60 to about 99 weight percent, more specifically from about 75 to about 97 weight percent and most specifically from about 85 to about 96 weight percent, said weight percents being based on the total weight of the flame retarded thermoplastic composition.
- In one embodiment the flame retarded thermoplastic resin composition can contain the stable suspension in an amount of from about 1 to about 40 weight percent, more specifically from about 3 to about 25 weight percent and most specifically from about 4 to about 15 weight percent, said weight percents being based on the total weight of the flame retarded thermoplastic composition.
- In one embodiment, the stable suspension of oxides, hydroxides, carbonates or mixed salts in a phosphate ester, can be added to a polycarbonate/styrene graft copolymer blend during extrusion. Known techniques of metering pumping of viscous liquids into one of heating zones of extruder are used.
- In one embodiment, the amount of the stable suspension component to be added to the thermoplastic resin will depend on the ratio of polycarbonate/styrene graft copolymer. The higher concentration of the polycarbonate the lower loading of stable suspension is required to achieve flame retardant effect and pass for example the UL-94 V-0 test. The amount of phosphate ester thereof can vary from about 1 to about 40, more specifically from about 3 to about 25, and more specifically from about 4 to about 15 weight percent of the total weight of the flame retarded thermoplastic composition.
- The flame retarded composition herein optionally contains a tetrafluoroethylene polymer, also referred to as PTFE, as antidripping agent. Suitable tetrafluoroethylene polymers for use in this invention typically have a fibril structure which tends to stabilize the polymer under molten conditions. The PTFE can be added to the thermoplastic resin composition as a direct solid or as a concentrate with a resin such as polycarbonate or SAN. Typically PTFE is added at the level from about 0.01 to about 2.0 but more specifically from about 0.1 to about 0.5 weight percent of the total weight of flame retarded thermoplastic composition.
- In addition the flame retarded thermoplastic composition herein, can contain one or more other additives in known and conventional amounts, e.g., antioxidants, UV stabilizers, plasticizers, fillers, reinforcements, pigments, colorants, other flame retardants, and the like, as is well known to those skilled in the art.
- In order that those skilled in the art will be better able to practice the invention, the following examples are given by way of illustration and not by way of limitation.
- 396.8 g of resorcinol bis(diphenyl phosphate) (Fyrolflex RDP, ex. ICL-IP) was added to a polyethylene (PE) beaker. 1.2 g of modified polyether dispersant (Tegomer DA 646, Evonik) was added to the beaker and a four bladed propeller Teflon stirrer was set up at 630 rpm for 30 minutes. After the initial mixing the stirrer was replaced in a Rotor-stator ultra-dispersor T-25 digital ultra-turrax (IKA) with dispersing element S25N-25F which was set up to low speed of 3,400 rpm. The disperser was run for less than one minute and then 2 g of hydrotalcite (HTC) of d50=1.2 micron (Hycite 713, ex. BASF) was added and the dispersing speed was increased to 10,600 rpm for 10 minutes and then increased to 12,600 rpm for additional 10 minutes. A uniform dispersion was observed. The dispersion was transferred to a glass jar. No sedimentation of the material at the bottom of glass jar was noticed. Long term stability of the dispersion was assessed by an accelerated aging method by heating the suspension in an oven at 54° C. for 14 days. No visual separation or precipitation was observed. The sample was also kept at −20° C. in a refrigerator for two weeks and no difference in the flowability compared to an equivalent sample kept at room temperature was detected. In addition no phase separation was detected at these temperatures.
- 194.3 g of resorcinol bis(diphenyl phosphate) (Fyrolflex RDP, ex. ICL-IP) was added to a PE beaker. 1.35 g of modified polyether dispersant (Tegomer DA 646, Evonik) and 1.35 of nonionic block copolymer of polyhydroxystearic acid and polyethylene glycol dispersant (Tersperse 2510, Huntsman) were added to the beaker and a four bladed propeller Teflon stirrer was set up at 630 rpm for 30 minutes. After the initial mixing the stirrer was replaced in a Rotor-stator ultra-dispersor T-25 digital ultra-turrax (IKA) with a dispersing element S25N-25F which was set up to a low speed of 3,400 rpm. The disperser was run for less than one minute and then 3 g of magnesium hydroxide (MDH) of d50=1.3 micron (FR-20-100D-S10AGrade, ex. ICL-IP) was added and the dispersing speed was for increased to 10,600 rpm for 10 minutes and then further increased to 12,600 rpm for an additional 10 minutes. A uniform dispersion was observed. The dispersion was transferred to a glass jar. No sedimentation of the material at the bottom of Vessel glass jar was noticed. Long term stability of the dispersion was assessed by an accelerated aging method by heating the suspension in an oven at 54° C. for 14 days. No separation or precipitation was observed. The sample was also kept at −20° C. for two weeks and no difference in the flowability compare to an equivalent sample kept at room temperature was detected. In addition no phase separation was detected at these temperatures.
- 196.2 g of resorcinol bis(diphenyl phosphate) (Fyrolflex RDP, ex. ICL-IP) was added to a PE beaker. 0.9 g of modified polyether dispersant (Tegomer DA 646, Evonik) and 0.9 of nonionic block copolymer of polyhydroxystearic acid and polyethylene glycol dispersant (Tersperse 2510, Huntsman) were added to the beaker and a four bladed propeller Teflon stirrer was set up at 630 rpm for 30 minutes. After the initial mixing the stirrer was replaced in a Rotor-stator ultra-dispersor T-25 digital ultra-turrax (IKA) with a dispersing element S25N-25F which was set up to a low speed of 3,400 rpm. The disperser was run for less than one minute and then 1 g of magnesium hydroxide (MDH) of d50=1.3 micron (FR-20-100D-S10AGrade, ex. ICL-IP) and 1 g of hydrotalcite (HTC) of d50=1.2 micron (Hycite 713, ex. BASF) were added and the dispersing speed was increased to 10,600 rpm for 10 minutes and further increased to 12,600 rpm for an additional 10 minutes. A uniform dispersion was observed. The dispersion was transferred to a glass jar. No sedimentation of the material at the bottom of Vessel glass jar was noticed. Long term stability of the dispersion was assessed by an accelerated aging method by heating the suspension in an oven at 54° C. for 14 days. No separation or precipitation was observed. The sample was also kept at −20° C. for two weeks and no difference in the flowability compared to an equivalent sample kept at room temperature was detected. In addition no phase separation was detected at these temperatures.
- Examples 1-3 were repeated with variation of concentration of inorganic ingredient and dispersants. The composition of the various stable suspensions of Examples 1-7 are shown in Table 1.
-
TABLE 1 Composition of dispersions Examples 1-7 Composition, wt. % Ex. 1 Ex. 2 Ex. 3 Ex. 4 Ex. 5 Ex. 6 Ex. 7 RDP 99.2 97.15 98.1 98.1 98.1 97.15 97.15 HTC 0.5 0.5 1.0 1.5 0.75 MDH 1.5 0.5 1.0 0.75 Tegomer DA 0.3 0.675 0.45 0.45 0.45 0.675 0.675 646 Tersperse 2510 0.675 0.45 0.45 0.45 0.675 0.675 - Comparative Example 1 and Examples 8-14 were prepared in the same manner. The polycarbonate resin (Lexan 141, ex. Sabic) and ABS resin (C8707 ex. Sabic) was pre-dried prior to the extrusion. The two resins and a RDP (Comparative example 1) or stable suspension (Examples 8-14) were thoroughly mixed in the proportions shown in Table 2 using a bowl mixer. The pre-mixed flame retarded compositions were slowly forced-fed into the extruder hopper. The extrusion was performed at 180°-250° C. using a conical twin screw co-rotating L/D=32 Brabender Plasti-Corder extruder. The extruded composites were cooled in water tray and pelletized, and dried of excess moisture in forced air ovens for at least six hours at 60° C. Test specimens were prepared by injection molding the pellets of compounded mixtures on Arburg All-Rounder Injection Molding machine at 210-265° C.
- The hydrolytic stability of the flame retarded compositions of Comparative example 1 and Examples 8-14 were evaluated by measuring the retained molecular weight of polycarbonate after various periods of exposure to high humidity at elevated temperature. About 3 ml of de-ionized water was placed into sealable vials. A wad of glass fibers was placed above the water to separate pellets from the direct contact with water. Identical amounts of the flame retarded composition in the form of pellets of substantially uniform dimensions were placed on the top of the glass fiber wad. The vials were sealed and then heated to 107° C. for 0, 30, 90 and 192 hours.
- Thereafter, the pellets were removed from the vials and extracted with acetone to isolate the polycarbonate which was then analyzed by GPC (gel permeation chromatography using chloroform) for determining the molecular weight.
- Flammability of the molded specimens of the flame retarded compositions was tested on 1.6 mm thickness bars following the UL-94 vertical burning protocol using an Atlas Chamber. Tensile and flexural strength was measured on Instron instrument following ISO 527 and ISO 178 respectively. Izod Impact strength was measured using a Pendulum Impact Tester following ISO 180.
-
TABLE 2 Compositions, hydrolytic stability, flammability and physical properties of flame retardant compositions. Composition, wt. % Comp. ex. 1 Ex. 8 Ex. 9 Ex. 10 Ex. 11 Ex. 12 Ex. 13 Ex. 14 PC 72.9 72.9 72.9 72.9 72.9 72.9 72.9 72.9 ABS 18.2 18.2 18.2 18.2 18.2 18.2 18.2 18.2 RDP 9.0 Suspension Ex. 1 9.0 Ex. 2 9.0 Ex. 3 9.0 Ex. 4 9.0 Ex. 5 9.0 Ex. 6 9.0 Ex. 7 9.0 Retain of Mw of PC, % 0 hours 100 100 100 100 100 100 100 100 30 hours 93 96 97 98 98 99 96 99 90 hours 59 78 88 79 85 74 81 84 192 hours 21 50 68 64 67 53 62 73 UL-94, 1.6 mm V-0 V-1 V-0 V-2 V-1 V-1 V-0 Tensile strength, MPa 54.1 53.4 53.6 53.7 53.4 53.4 53.8 Flexural Strength, MPa 8.8 10.4 10.0 10.9 10.6 9.7 9.5 Modulus, MPa 2400 3100 2800 3200 3100 2700 2900 Izod impact, J/m 615 610 658 693 693 614 631 - As Table 2 shows the flame retarded composition based on regular grade of RDP retains only 21% of the original weight of polycarbonate after exposure to high temperature and moisture for 192 hours. In contrast the flame retarded composition with stable suspensions of MDH or HTC or mixtures thereof retained from 50 to 73% of the original molecular weight of polycarbonate.
- While the invention has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed as the best mode contemplated for carrying out this invention but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (13)
1. A stable suspension of at least one of an inorganic oxide, an inorganic hydroxide, an inorganic carbonate and mixed salts thereof of the metals of groups II and III of the Periodic Table of Elements in a liquid phosphate ester.
2. The stable suspension of claim 1 comprising:
a. from 90 to 99.98 wt. % of at least one liquid phosphate ester;
b. from 0.01 to 5 wt. % of at least one of an inorganic oxide, an inorganic hydroxide, an inorganic carbonate and mixed salts thereof; and,
c. from 0.01 to 5% of at least one dispersant
3. The stable suspension of claim 1 wherein phosphate ester is represented by the general formula (I):
4. The stable suspension of claim 1 wherein the inorganic oxide, inorganic hydroxide, or inorganic carbonate are selected from the group consisting of Mg(OH)2, MgO, Al2O3, Al(OH)3, MgCO3, (MgOH)2CO3, CaCO3, ZnO, ZnCO3 and mixtures thereof.
5. The stable suspension of claim 1 wherein the mixed salt is natural or synthetic hydrotalcite represented by the general formula (II):
M2+ (1-x)M3+ x(OH)2An x/2 mH2O (II)
M2+ (1-x)M3+ x(OH)2An x/2 mH2O (II)
wherein M2+ is a divalent metal ion, M3+ is a trivalent metal ion, An is an n-valent anion, n is an number greater than 0, preferably 2, x is 0 to 0.5, preferably 0 to 0.33, and m>0.
6. The stable suspension of claim 1 further comprising at least one of a cationic, anionic or nonionicdispersant.
7. The stable suspension of claim 6 wherein the dispersant is selected from a nonionic modified polyether dispersant or nonionic block copolymer of polyhydroxystearic acid and polyethylene glycol or mixtures thereof.
8. A flame retarded thermoplastic resin composition comprising a hydrolysis-susceptible thermoplastic resin and the stabilized dispersion of claim 1 .
9. The flame retarded thermoplastic resin composition of claim 8 , wherein thermoplastic resin is a polycarbonate or a polycarbonate blend.
10. The flame retarded polycarbonate resin composition of claim 9 , whereas the thermoplastic resin is a polycarbonate/acrylonitrile-butadiene-styrene blend.
11. An electronic component comprising the flame retarded thermoplastic resin composition of claim 8 .
12. An electronic component comprising the flame retarded thermoplastic resin composition of claim 9 .
13. An electronic component comprising the flame retarded thermoplastic resin composition of claim 10 .
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US14/772,223 US20160017117A1 (en) | 2013-03-22 | 2014-02-21 | Suspension of inorganic material in phosphate ester, a flame retarded thermoplastic composition containing the same |
PCT/US2014/017739 WO2014149370A1 (en) | 2013-03-22 | 2014-02-21 | Suspension of inorganic material in phosphate ester, a flame retarded thermoplastic composition containing the same |
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US20170367676A1 (en) * | 2016-06-23 | 2017-12-28 | Medvoice Biotech Corp. | System for detecting disease of the internal organs from voice, waveform and physiological changes |
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US5332523A (en) * | 1988-11-29 | 1994-07-26 | Nippon Oil & Fats Co., Ltd. | Dispersion-stabilizing agent for inorganic powder in oily material |
US20070149722A1 (en) * | 2004-08-05 | 2007-06-28 | General Electric Company | Flame retardant thermoplastic polycarbonate compositions, method of manufacture, and method of use thereof |
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FR2760019B1 (en) * | 1997-02-24 | 1999-04-30 | Gen Electric Plastics Abs Euro | COMPOSITIONS OF FLAME RETARDANT STYRENIC POLYMERS AND COPOLYMERS |
TW444041B (en) * | 1998-02-13 | 2001-07-01 | Gen Electric | Flame retardant carbonate polymer composition with improved hydrolytic stability |
JP2007009054A (en) * | 2005-06-30 | 2007-01-18 | Suminoe Textile Co Ltd | Flame retardant and method for producing the same |
US8378012B2 (en) * | 2005-11-08 | 2013-02-19 | Icl-Ip America Inc. | Flame retardant composition and hydrolysis-susceptible resin containing same |
CN102250565A (en) * | 2011-06-09 | 2011-11-23 | 罗寅 | Fireproof sealant |
-
2014
- 2014-02-21 WO PCT/US2014/017739 patent/WO2014149370A1/en active Application Filing
- 2014-02-21 US US14/772,223 patent/US20160017117A1/en not_active Abandoned
Patent Citations (2)
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---|---|---|---|---|
US5332523A (en) * | 1988-11-29 | 1994-07-26 | Nippon Oil & Fats Co., Ltd. | Dispersion-stabilizing agent for inorganic powder in oily material |
US20070149722A1 (en) * | 2004-08-05 | 2007-06-28 | General Electric Company | Flame retardant thermoplastic polycarbonate compositions, method of manufacture, and method of use thereof |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US20170367676A1 (en) * | 2016-06-23 | 2017-12-28 | Medvoice Biotech Corp. | System for detecting disease of the internal organs from voice, waveform and physiological changes |
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